Lovelorn Leghorn (1951)

Miss Prissy is trying to land a husband. All the other hens laugh, and make fun of her, saying she couldn't catch a husband with a bear trap. When they ask Prissy if she has something to clunk him on the head with, Prissy hears them says "Yes", and reveals a rolling pin. And with that, she leaves the coop ignoring the other hens laughing.
Meanwhile, Foghorn Leghorn is taking a nap in the sun. The Barnyard dog sees his chance, and splashes cold water, thus waking the rooster up with a shock and scream. When he demands who's responsible, the dog reveals himself. Just when the rooster's about to catch him, he closes Foggy's umbrella on him. Foghorn then says the popular line as the dog walks away., "'Course ya know, this means war!"